<?php
/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{
    private $_id; 
    
	/**
	 * Authenticates a user.
	 * The example implementation makes sure if the username and password
	 * are both 'demo'.
	 * In practical applications, this should be changed to authenticate
	 * against some persistent user identity storage (e.g. database).
	 * @return boolean whether authentication succeeds.
	 */
	public function authenticate()
	{
        $findBy = '';
        //if user input username 
        if(strpos($this->username, '@') === false)
        {
            $findBy = 'username'; 
        }
        else
        {
            $findBy = 'email'; 
        }

        $user = User::model()->findByAttributes(array($findBy => $this->username));

        if ($user===null) 
        { 
            // No user found!
            $this->errorCode=self::ERROR_USERNAME_INVALID;
        } 
        else if ($user->password !== SHA1($this->password)) 
        { 
            // Invalid password!
            $this->errorCode=self::ERROR_PASSWORD_INVALID;
        } else { // Okay!
            $this->errorCode=self::ERROR_NONE;
            Yii::app()->user->setReturnUrl('/admin');
            // Store the role in a session:
            $this->setState('role', $user->role);
            $this->_id = $user->id;
        }

        return !$this->errorCode;
	}

    /**
     * getId get id for current user.
     * 
     * @access public
     * @return void
     */
    public function getId()
    {
        return $this->_id;
    }
}
